flr_null

2 ms·

1. 1.▲
   by flr_null 10y ago

   Of course I'm asking with context of massive parallel realtime queries from customers as it's going in yandex metrika or google analytics. And yes 100T lines with Hive+ORC it's not an issue, but it's another league. I as
2. 2.▲
   by flr_null 10y ago

   What open source columnar storage do you use for 100 trillion records? It's very impressive.
3. 3.▲
   by flr_null 10y ago

   No, it's actually not. Cassandra is not columnar db. It means if you need all user_id from your table Cassandra will scan all your data (e.g. 10PB) on disks. But ClickHouse will only scan 1 column file (e.g. 10GB). ClickHouse is Russia